How long have you been together in total?
Ahh you were long distance as well - that means you DIDN'T likely know each other that well.
Reason I make the above comments:
For the 1st 12-18 months the rose glasses are firmly in place biochemically and psychologically speaking AND people are on their best behaviour so it's unwise to make a major commitment in this period imo
BUT what then happens is kinda the opposite - you see allllll their faults and they yours and the effort of being on best behaviour slips. This supposedly lasts also approx 12-18 months
This also dissipates and a more realistic view of your partner/spouse is reached and they of you.
With long distance you don't get to know each other as well as you would without it. Partly due to the practicalities of dating and geographical distance, partly as you're then only required to be on best behaviour on the occasional meet-ups which means overall people are able to maintain the best behaviour within the relationship for a longer period than usual. It's also because you're not spending time together in a "normal" way if you're long distance it's a bit more intense but also a bit more removed from normality.
Re nothing in common - bit odd this seems to be an issue now. Most people generally do notice this fairly early on.
My ex and I are very much opposites!
I - am academically intelligent, bookish even, I like theatre, cinema, art, pop and rock music but nothing too extreme, puzzles, cross stitch, knitting, coffee and a chat with friends, very politically engaged (socialist leaning) and enjoy discussing, vegetarian but love food and cooking, and anti animal cruelty, barely drink (we met at a club but I wasn't really a club person even then - late teens/early 20's - I was there for a friends birthday outing)
He - left school with 3 GCSEs he scraped, joined the army at 17 basically cos his dad was army and he couldn't think what he really wanted to do, he wasn't even sure what area of army he wanted to go into the recruiter basically chose for him!, not academically intelligent by any stretch, not a reader, rarely managed to watch a film as couldn't maintain the concentration, thinks theatre and art are boring and would never even go to a musical/comedy, heavy metal fan musically disliked chart/gentler music, very into sport especially rugby, hates "sitting about doing nothing", likes to be physically active always, had NO clue about politics when I first met him despite this being the time of the first gulf war being very recent and he and his colleagues still being deployed over there, he had zero understanding of the issues involved, didn't read any papers or watch the news as it was "boring" and when I did and stuff about military came up etc he didn't understand how it connected to his life, very fussy eater and COULDN'T cook, loved meat though especially bacon, big drinking culture in the army so I was wary of that he was a regular but not heavy drinker, out at clubs or gigs/concerts 3-4 nights a week
So...on paper we were very different but:
We had the same sense of humour, liked the same comedians, liked the same fictional tv shows mostly, initially had the (seemingly) same values re family, marriage and kids, although he wouldn't have identified them as such at the time as he simply didn't have the understanding/vocabulary we held similar political views, both from big families (he's youngest of 4 I'm eldest of 3 but in addition my parents are each from big families and despite distance I was very close to my cousins), sexually compatible.
So there were pros and cons.
When we split SO many people said to me that they were very surprised we'd lasted as long as we had (10 years married, 13 almost 14 years together) BECAUSE he really was as thick as 2 short planks! And they didn't "see me" with someone like that.
Briefly, my dd has recently reconnected with him and she is VERY intelligent much more than me! Couple of conversations we've had she's been like "geez it's hard you really have to put everything in words of one syllable for him don't you?"
Which is true. He's not really...stupid he can be very knowledgeable in areas he's INTERESTED in but anything remotely academic or of that level and he's lost!
Dd has just started uni and she's had to "dumb down" her explanation of exactly what she's studying, explaining how the accommodations and financing works etc
Ex sees uni and student loans as not worth the trouble and very much was negative even about the IDEA of dd going to uni it was all so alien to him, at one point I was getting so worried as he seemed to be putting HER off!
You DO need to have certain things in common I think for a relationship to work (and yes I know mine didn't - his infidelity - but it did for a while and I've obviously observed others too) and even studies experts agree on the following:
Same values in terms of family/marriage etc
Same approach to finances (we had a few issues there)
Roughly same values politically or at least not totally opposite
Similar sense of humour
Similar approach to friendships (as these are also relationships of a type)
Many couples have different hobbies and interests but are able to come together in other ways.
Wife 2 has a phd! So she's very intelligent too, dd says that some of their arguments do basically come down to him not understanding things wife is trying to discuss and wife gets frustrated with having to always simplify for him.